In essence, the lighter the pulley (the less rotating mass), the lighter the "load" on the engine. This, of course, leads to less power loss. Also, "underdrive" pulleys (smaller diameter than stock) will increase power due to their less weight and increased spinning (don't get this confused with putting a smaller pulley on a supercharger, though). Others will, I'm sure (hoping) chime in.
yeah, because of the less weight & power it takes to spin the pulley, I guess you don't lose as much power to the wheels. You don't neccessarily gain power, but you gain control of some lost power to the wheels. If that makes sense. I guess it also causes your car to accelerate faster. But I'm no technical wizard, so don't quote me on that.
i have an underdrive pulley, it was worth it, you can feel a teeny bit more "smoothness" when you accelerate. There is no discernable loss in alternator performance whatsoever, or ac or anything for that matter. It is sorta a biotch to get the crank pulley off you need to bust out the old breaker bar and soak the thing in wd40
racinwrx, i have a subwoofer installed in my car....nothing huge cause im more about speed then sound...i think im running like 4 somthing hundred watts rms....when the car is idiling and the bass hits hard the voltmeter i installed blips to about 13 volts instead of 14 when the alt is recharging the battery. But when im driving around there is no loss noted on the vm.
Here's something I kinda learned after getting my alternator replaced (so take it for what it's worth).
When you put an excessive load on the car's electrical output (ie big amp, big speakers), although the stock alternator can "handle" it, it may, in the long run, shorten the life of the alternator.
Alternators are not made to be constantly running. A regulator let's it know when to run or not to charge the battery. A constant large load on the battery will make the alternator run more frequently and duration. This may lead to the alternator failing. There are fixes for this, but I don't know them
Alternators are not made to be constantly running. A regulator let's it know when to run or not to charge the battery. A constant large load on the battery will make the alternator run more frequently and duration. This may lead to the alternator failing. There are fixes for this, but I don't know them [/B][/QUOTE]
<<(If)>> you have a Aftermarket Sound system, that will drain the stock battery quick! Try upgrading to a dry cell series battery. $120.00 or so... and I would recommend a Lighting cap $150.00. That will keep a more constant voltage to all your accessories. Every time That Sub or Sub's hit... it will try to pull juice from every electrical source.
In my last car I had a decent system in it. every time my subs hit ( (4) 12" solobaric's, (2) zr1000 amps, zero gage wiring.) All my accessories would dim. And my car was stock. It was a FORD POS though. =)
Anyways before I installed my Gel battery and Lightning Cap my alternator went within 4 months. After installing those items I was set.
Just bolt on a TURBO if you want more power!
K&N Drop in
Apexi World Sport Exhaust